BNSF
| BNSF Railway | 26 |
CO
| Chesapeake & Ohio | 1 |
CR
| Conrail | 1 |
CSX
| CSX Railroad | 64 |
CWRX
| CWR TRANSPORTATION CO. | 15 |
GREX
| Georgetown Rail Equipment Company | 2 |
LBFX
| L B Foster Co | 5 |
MILW
| Milwaukee Road | 2 |
SBD
| Seaboard System | 1 |
SPSX
| Progress Rail Services Corp | 11 |
UP
| Union Pacific Railroad Company | 8 |